Pictures of the day: 23 November 2012

Manta rays feed at Hanifaru Bay, Baa Atoll, Maldives. The manta rays congregate in numbers up to 100, to filter feed on on the plankton carried into the bay by currents. British photographer Ed Brown was snorkelling at Hanifaru Bay in Baa Atoll when he came across 30 mantas gliding through the ocean, the majority following one behind the other. He said: "The mantas had wingspans of approximately four metres and looked like underwater bats."Picture: Ed Brown/Rex Features